Toggle panning.
Implement Clear Notes.
Add constraints to contain clear notes and toggle pan to nib.
Clamp DrawView.
Remove pan switch, implement 2-finger gesture.
Change Orientation check to maintain consistency.
Minor constraint adjustment to Clear Notes button.
Minor orientation improvement. Decreasing width of ColorSegmentedControl.
Add DrawViewController string constant.
Implementing navigation state methods.
Implementing pen size slider.
Refactoring bezier system. Fixing line width.
Disabling pan gesture, implementing initial eraser.
Implementing undo.
Implementing basic stamp functionality.
Enhancing undo functionality to handle shapes.
Implementing shape stamping.
Merging Integration.